Semantic Issues in e-Commerce Systems comprises the proceedings of the Ninth Working Conference on Database Semantics, which was sponsored by the International Federation for Information Processing (IFIP) and held in Hong Kong in April 2001.

Session I: Contracts.- 1. Contracts in E-Commerce.- 2. The Role of Contract and Component Semantics in Dynamic E-Contract Enactment Configuration.- 3. A Dynamic License Agreement System for Reuse of Web Contents.- Session II: Security Issues.- 4. Secure E-Commerce Transactions, Modeling and Implementation Aspects.- 5. From Call for Tenders to Sealed-Bid Auction for Mediated Ecommerce.- 6. Web Notary Systems for Privacy Keeping E-Commerce.- Session III: Process Interoperability.- 7. Seamless Integration of Inquiry and Transactional Tasks in Web Applications.- 8. An XML-based Interorganizational Knowledge Mediation Scheme to Support B2B Solution.- 9. Views for Inter-organization Workflow in an E-commerce Environment.- Session IV: Semantics Mining.- 10. Capturing the Semantics of Web Log Data by Navigation Matrices.- 11. Discovery of Semantic Relationships among Web Pages Based on Web Topic Structures.- 12. WebSifter: An Ontological Web-Mining Agent for E-Business.- Session V: Using Metadata for Integration.- 13. Infomediation for E-business enabled Supply Chains: A Semantics Based Approach.- 14. An Analysis of Integration Problems of XML-Based Catalogs for B2B Electronic Commerce.- 15. A Model to Support E-Catalog Integration.- Session VI: Service Integration.- 16. The IRules Project — Using Active Rules for the Integration of Distributed Software Components.- 17. Towards A Semantic Framework for Service Description.- Session VII: Application Modeling.- 18. A Model-Based Approach to Web-Application Development.- 19. The Importance of Ownership for E-Commerce.- 20. Constraints as Mobile Specifications in E-Commerce Applications.- Author Index.